Herbs

Butterbur

Also called: petasites

A plant used for migraine and allergies.

Why people take it
Migraine prevention, hay fever.
What the evidence says
Some evidence for migraine prevention.
How it is usually taken
Only PA-free products, 50 to 75 mg twice a day; liver injury reports.
Be careful
Unprocessed butterbur contains liver toxins; use only products labelled PA-free.
Medicines it can interact with
Avoid with liver-affecting medicines.

Other herbs

EchinaceaElderberryGarlic extractGingerPeppermint oilMilk thistleSaw palmettoSt John's wortValerianChamomileLemon balmPassionflowerKavaRhodiolaGinkgoMoringaFenugreekCinnamonBlack seedLicorice

Common questions

What is Butterbur?

A plant used for migraine and allergies.

Why do people take Butterbur?

Migraine prevention, hay fever.

Does Butterbur work?

Some evidence for migraine prevention.

How much Butterbur do people take?

Only PA-free products, 50 to 75 mg twice a day; liver injury reports.

Is Butterbur safe?

Unprocessed butterbur contains liver toxins; use only products labelled PA-free.

Does Butterbur interact with medicines?

Avoid with liver-affecting medicines.

Sources and further reading

Last reviewed 31 October 2026. Written by Satya Babu.

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